Mechanism for charging furnaces.



D. BAKER.

. MECHANISM FOR CHARGING FURNACES.

APPLICATION FILED MAY 28, 1904.

Y 910,264. Patented Jan.1i9,1909.

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. k lmllb 25 8 L 4 W L v D. BAKER. MECHANISM FORGHARGING PURNAGES.

APPLICATION FILED MAY 28, 1904.

910,264. Patented Jan. 19, 1909.

6 SHEETS-SHEET z.

. 1). BAKER. MECHANISM FOR CHARGING FURNACES.

APPLICATION FILED MAY 28, 1904.

Patented Jan. '19, 1909.

6 SHEETS-SHEET 3.

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D. BAKER,

, MECHANISM FOR CHARGING FURNACES. APPLICATION FILED MAY 28,1904.

- AWE/ 709;

M/(T/VESSES,

' WWW WWW! Y mwg m Arr) Patented Jan. 19, 1909.

6 SHEETS-SHEET 4.

D. BAKER.

' MECHANISM FOR CHARGING FURNACES.

APPLICATION FILED MAY 28, 1904.

Patented Jan. 19, 1909.

' 6 SHEETS-BHEET 5.

//v VII/V709 D. BAKER.v

MECHANISM FOR CHARGING FURNACES.

APPLICATION FILED MAY 28. 1904.

" 910,264. Patented Jan. 19, 1909.

6 SHEETS-SHEET 8.

5 Jan; 211:

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DAVID BAKER, or NEWTON, MASSACHUSETTS, ASSIGNOR To THE BROWN HOISZE NGMACHINER COMPANY, A CORPORATION or OHIO.

amcns msm For. caaasme FURNACES. 7

v Sp cification of Letters Patent.

' 'Eatented Jan. 19, 1909.

To all whom 'it mag comma:

Be it known that I, DAVID BAKER, of Newton, county of Middlesex, andState of Massachusetts, have invented a new and useful Improvement inMechanism for Charging Furnaces, of which the following 1s aspecification.

In' the practical operation of blast furnaces perhaps the greatestobjection to be overcome is the tendency of the stock, such aslimestone, ore, coke, &c., to sort and be distributed unevenly,resulting in irregular working, an inferior product, the earlydestruction of the lining of the furnace and inefiective actiongenerally.

Under the earlier systems of charging the operating to adjust the hoper, after 1t has furnace b hand-barrows, where it was ossible to ump theloads at predetermined points around the mouth of the hopper, and toarrange the different materials the manner desired, a uniform andsatisfactory distribution was attainable, although at the expense ofconsiderable time and labor; and

while on the introduction of the modern system of char and labor of dhand barrow system was saved, it has been at the sacrifice of uniformdistribution, the absence of which has proved more expensive andobjectionable as a final result than the saving of time and labor.

It is the aim of my invention to combine in a single system ororganization, the time and labor features of the skip hoist system, andthe uniformity of distribution of the hand barrow system; and myinvention consists primarily in the combination with means for hoistingand dumping the materials of the charge, of a cooperating device forreceiving the materials before they enter the furnace, and adapted to beactuated to dispose'the materials or ingredients of the charge incertain predetermined relations to each other; and adapted also todispose the dilfer'ent charges in certain-predetermined relations toeach other; whereby the charges may be distributed in the furnace in auniform manner, and in the arrangement most favorable for regularity ofworking, the prolongation ofthe life of the furnace and effective actiongenerally.

The device for receiving the materials before they enter the furnace andby which they are disposed in the proper predetermined relations, ispreferably in the 'form' of a rotary receiving hopper, arranged over byskip hoists, the time the main hopper or throat of the furnace, whichrotary hopper is actuated bycontrollable m thanism in such manner thatwhile receiving the loads from the skip at a singlepoint, it may bemoved or adjusted to change the position of the deposited load withreference to the receiving point, so that the disposition of the-loadsma be readily controlled, and a distribution 0t the materi-' als in thefurnace effected in the manner desired. N

The invention consistsalso in automatically operating mechanism forinitiating the movement of the hopper and arresting the same at theproper predetermined points.

The invention consists also in mechanism I materials previously charged.

The invention consists also in the details of coiistruction andcombination of parts hereinafter described andcla'imed.

In the accompanying drawings: Figure 1 is a side elevation ofa'blastfurnace having my invention applied :thereto. Fig. 2 is a sectionalelevation of the top of the furnace on an enlarged scale. Fig. 3 is asimilar View looking in the direction of the arrow in Fig.

'2. Fig. 4 is an erdarged view of the mechanisms for controllingautomatically the movements of the rotary hopper. Fig. 5 is an edge viewof the same. Fig. 6 is a view in the nature of a diagram, showing therelation and the connection of the various cooperating mechanisms andthe electric circuits. F gs. 7 and 8 are diagrammatic views showing thedistribution'of the loads in the rotary hopper.

Referring to the drawings: 1 represents a blast furnace having at itstop the usual main hopper 2 .closed by a'main-distributing.

hell 3, suspended by a verticalrod 4, to the upper end of which isjointed a weighted operating lever 5 pivoted on the superstructure ofthe furnace and having connected with it a piston 6, working inacylinder 7.

' Thelcylinderis supplied with air, steam or other actuating fluid froma suitable source, and is controlled by a valve 8,

a Rising from the upper end of the main hopper ,and sustained by the topof the furnace, is a cylindrical throat 9 provided in the outer side ofthe throat on horizontal supports projecting from the said throat.

The relation of the parts is such that the rotating hopper is sustainedfree of the edge of the throat, with the rib terminating a slightdistance above the cavity 10, which latter receives and becomes filledwith the dust permeating the furnace gases, and in connection with therib 11 forms an effectual seal, which while in the event of an explosion above the main bell, would relieve the sudden pressure and preventinjury to the parts, would soon become efi'ective again by theaccumulation of dust in the cavity. The lower part of the rotary hopperslopes downward and inward with its lower edge terminating within thethroat 9, and it is closed by an auxiliary bell 16, movable up and downand also rotatable with the hopper; This auxiliary bell is suspended bya tubular stem 17 inclosing the stem of the main bell, and sustained atits upper end in a hanger 18 in such manner that it may loosely turn inthe hanger so as to partake of the motion of the rotary hopper. Thehanger 18 is*connected by vertical links'19 with the inner end of aweighted actuating lever 20 pivoted to the superstructure of the furnaceand having connected with its outer end a piston 21 working in acylinder 22 supplied with air or steam or other actuating fluid from asuitable source and controlled by valve 23.

The materials to be charged into the furnace are hoisted by skip cars 24traveling on an inclined track 25, leading from the base of the furnace,to which 'cars' are connected a hoisting cable 26 passing over a guidepulley 27, at the top of the superstructure, thence to a winding drum 28near the base .of the furnace, which drum is preferably actuated by anelectric motor 29 controlled by a switch 30, operated by lever 31. Theskip cars are preferably arranged to dump directly into the hopper atthe side as shown,

but for certain forms of furnaces, the cars may be arranged to dumphigher up into the upper end of a long chute, shown by dotted lines inFig. 2, extending diagonally downward across the superstructure with itsdischarge end terminating at the upper edge of the hopper.

The movements of the rotary hopper may be effected by any suitable powermechanism controllable in its action so as to adjust the hopper to thedifferent. positions desired, but I prefer to employ an electric motor32 forthis purpose, for the reason that it will give more perfectcontrol of the hopper, and willenable me to more readily effect andcontrol the automatic operation of the'same, and will permit of thecooperation with the bell operating and other mechanisms. 4

The motor 32 as shown in Figs. 1 and 2 is supported at the top of thefurnace to one side, on a bracket 33, and receives its current from agenerator G which may be situ-' ated at any, convenient location. Thearmature shaft 34 of the motor is provided with a Worm 35 engaging ahorizontal worm wheel 36 on a vertical shaft 37, to the upper end ofwhich a driving pinion 38 is fixed in position to engage acircumferential rack 39 on the rotary hopper. Beneath pinion 38, theshaft has fixed to it a smaller pinion 40 engaging a gear wheel 41 onthe upper end of a vertical pilot shaft 42 which extends downward to thebase of the furnace, where are situated the automatic controllingmechanisms shown particularly in Figs.,4, 5 and 6 and now to bedescribed. The controlling mechanisms comprise two devices 43 and 44both actuated by the pilot shaft 42, one of which devices, 43, serves toarrest automatically the advance of the hopper after it has proceeded apredetermined distance, while the other device 44 acts to autoniaticallyarrest the motion of the hopper after it'has moved in a reversedirection for a predetermined distance. The purpose of t the firstdevice is to control the movements of the hopper, so that the materialdumped by the skip cars will be arranged at equal intervals around thehopper, and this is accomplished by moving the-"hopper a predetermineddistance after the deposit of'each load. from the skip car, thecontrolling device acting-to automatically arrest the hopper at theproper point after each advance movement. The purpose of the othercontrolling device 44 is to govern the movement ofthe hopper, so thatafter it has received the different dumps of the skip car at intervalsunder the control of the first device, it may be operated to change therelation of the entire load with reference to those previously enteringthe furnace, which is effected by turning the hopper with its dumps in areverse direction, the controlling device 44 acting to arrest the sameat the proper point.

The controlling device 43 consists of a vertical rotary disk 43 drivenin one direction from the pilot shaft, through the medium of a countershaft 45 having fixed to one end a bevel gear 46 engaged by a bevelpinion 47 loose on the pilot shaft and. formed with ratchet teeth 48adapted to be engaged by a driving dog 49 on a sleeve 50 fixed to thepilot shaft, the arrangement being such that the driving do will becomeeffective and the gear 47 will be rotated eraser,

one direction only as indicated by the arrow,

out moving the gear. The opposite end of .the counter shaft is providedwith a bevel gear 51 engaging bevel teeth 52 on the rear face of thedisk. 'The disk has projecting tion of the tram its front face a. seriesof actuating pins the same at equal distances apart, which pins areadapted to engage and opena switch 52*, controlling motor-32, so thatwhen the switch is closed and the motor operates, the rotary hopper willbe turned and motion will be imparted by the pilot shaft to the disk 44,which will be rotated in the direction of the arrow until one of theactuating pins engages the switch, whereupon the latter will be openedand the hopper and disk will come to a rest.

The switch 52 comprises two terminals 53 and 54 adapted to beelectrically connected in the motor circuit by 55 on a movable slide 56jointed to a weighted lever 57 provided with a finger 57 extendingnormally in pins of the disk, which lever is adapted to e rocked on afixed pivot pin 58 extending through a slot 59 in the lever, so that inaddition to its rocking motion to close and open the switch, the levermay be lifted on its pivot in order to allow its depending finger 57 -tobe lifted over the actuating pin (whichlast engaged it) when the lever1s rocked to close the switch.

In the present instance the form and relagear for rotating the hopperand that for turning disk 43, are such that the disk will makeone-quarter of a revolution, while the hopper is making a full turn, andthe actuating pins are so spaced on the disk that the hopper will bearrested at each quarter turn, with the result that the skip loads willbe deposited respectively at fourequally spaced points in the hopper. Itis obvious, however, parts may be-variously modified to meet the varyingconditions encountered in practice as regards the character and numberof the ingredients composing a complete charge, the size of the hopper,&c.

. The operation of the mechanism thus far described,;i's as follows:Assuming that the parts are in the position shown in the drawings' withthe switch 52* for the hopper motor open, switch 30 for the hoist motoropen, with said mechanisms at rest, and finger 57 of switch lever 57 inthe path of actuating pin a.(by. which it has just been moved to throwthe switch lever and open the switch) the operator depresses lever. 31,thereby closing hoist motor switch 30, and hopper motor switch 52, wluchlatter action is effected through the medium of a rod 60 jointed at itslower end to lever 31 and at its &c., extending in a circle aroundcontact fingers the path of the that these relations of the its pivotpin, and will at the same time lift it bodily and carry the projectingfinger 57 over actuating pin a simultaneously sliding contact fingersonto terminals 52 and 53. The two'motors now being in circuit, thehopper begins to revolve, the disk 43 to turn, and the loaded skip carto ascend, and these motions continue until actuating pin 6 engagintgfinger, 57 throws the switch lever to its ormer position, which actionwill open switch 52*, and the weighted head 57 b engaging vibrat' lever61 will pull upward on rod iiiiil open hoist motor switch 30. The hoppernow comes to rest, and the skip dumps its load into the same. Lever 31is again depressed, and the foregoing operations being repeated, thehopper is moved another quarter turn and is stopped by pin ceives itsfourth dump from the skip. The

auxiliary bell 16. closing the rotary hopper is now opened by theactuation of valve 23 by lever 23, and the contents of the hopperdescend into the main hopper onto the mam bell. The operations abovedescribed are A now repeated, and the rotary hopper is again filled withfour dumps from the skips, but before these dumps are discharged intothe main hopper, the main bell is opened to charge the contents of themain hopper into the furnace, and simultaneously, by the mechanismpresently to be described, the rotary hopper with its second load isturned back a predetermined distance so as to change the relation of thefour dumps there in, to those just discharged into the furnace from themain hopper, to the end that when the second hopper load enters thefurnace, the spaced dumps will not fall directly on those already thefurnace and occupy the same positions. By this manner of charging thefurnace, if the first hopperful is made u of four skip loads of coke,and the second opperful is made up .of four skip loads of mixedlimestone and ore, when the two hopperfuls finally reach the interior ofthe furnace, the indlvidual dumps of the second hopperful may be causedto occupy the proper distance;

in a case similar to the present, four dumps required to fill thehopper, and where the hopper is filled and so on, the

first w1th four dumps of coke, and then with four dumps of mixed limeand ore, which makes one complete furnace charge, to turn the hopperback at the first operation, that is when the first hopperful enters thefurnace, 30, and at the second operation, when the second hopperfulentersthe furnace onto the first, the hopper is turned back and at thethird 0 eration 30, and then 60, e ect being to divide, as it were, thefour dumps in.the hopper into twelve, thus effectually eliminating anytendency of the lumps to form a chimney in the furnace, which wouldoccur if the successive hopperfuls were introduced into the furnace,with the individual dumps on top of those preceding.

The controlling device 44, which as before stated, governs the reversemovement of the hopper", consists of a switch 62 adapted, when closed,to reverse the motion of motor 32, and a rotary disk 44 driven from thepilot shaft in a direction opposite disk 43*, and provided'withactuating pins M and N serving to open the switch automatically andarrest the motion of the hopper-when the latter has moved backward apredetermined distance, according to the location of the pins. The disk44 is driven from the pilot shaft through the medium of a counter shaft63 provided at one end with a pinion 64 engaging gear teeth 65 on therear face of the disk, and having fixed to its opposite end a bevelpinion 66 meshing with a bevel gear 67 loose on the pilot shaft, andformed with'ratchet teeth 68 engaged in one direction only by a drivingdog 68* on a collar 69 fixed to the shaft. The arrangement is such thatwhen the shaft is rotated in a reverse direction, as indicated by thearrow in dotted lines, the dog will engage the ratchet teeth on pinion67 and will impart the motion of the shaft to the same, and drive disk44 in a direction opposite the other disk 43*; but if the pilot shaft isrotated in the other direction the dog will not engage the teeth with adriving action but will slip over the same. The switch 62 consists oftwo terminal points 70 and 71, which are so connected withthe motorcircuit, as will be more fully described hereinafter, that when they areelectrically connected by contact fingers 7 2 on a slide 73, the currentfrom the generator Wlll. pass in a reverse direction through the motorwith reference to the direction of the current through switch 52*, withthe result that the motor will turn backward and will impart acorresponding movement to the hopper. Slide 7 3. carrying the contactfingers'is jointed near the upper end of a weighted switch lever 74slotted as at 75 and mounted to lift and rock on. a fixed pivot pin 76.At its lower end the lever is provided with a finger 14 extendin in thepath of the actuating pins M and so that when engaged by said pins thelever will be rocked and moving the contact fingers free of theterminals the switch will be opened.

The closure of the switch is effected by a lever 77 connected by avertical rod 78 with a vibrating arm 79, whose end is adapted to engagea horizontal arm 80 projecting from the switch lever 74 at a point belowits pivot pin, which vibrating arm, when lever 77 is depressed, willrock the switch lever on its pivot and at the same time will lift itsfinger 74' over actuating pin M (which has just engaged the finger andopened. the switch,) leaving the finger in the path of the nextactuating pin, ready to be operated by said pin to rock the switchleve'. and open the switch.

As before stated the reverse movement of the hopper is initiatedsimultaneously with the opening of the main bell when the firsthoppe'rful is discharged into the furnace, and in order .to effect thisaction the switch operating mechanism and the mechanism for operatingthe main bell are connected in such manner that when lever 77 isdepressed to reverse the movement of the hopper, it will also actuatecontrolling valve 8 and admit pressure to cylinder 22 operating the'main bell. The connection of these mechanisms is illustrated in Fig. 6where it will be seen that lever 77 is provided with an extension or arm77 connected by links 77 with a crank arm 7 7 c on the stem of valve 8,the arrangement being such that when lever 77 is depressed to reversethe hopper, valve 8 will be turned and will admit pressure to cylinder22 and the main bell will be lowered; and when the lever 77 77 is raisedon the rocking of the switch lever by the actuating pin to open theswitch and arrest the motion of the hopper, the valve will be turned to.cut off the pressure and open the cylinder to the atmosphere, allowingthe cylinder to exhaust, and weighted lever 20 to return the bell to itsformer closed position.

By the cocperation of the mechanisms described in the manner set forth,the successive operations of lever'3l will act to rotate the hopperintermittently and will cause the skips to deposit their contents atequal intervals therein; while the operation of lever 23 will depositthe contents of the hopper into'the main hopper. The further operain acertain definite by providing ad tions of lever 31 as before, will againrotate the hopperintermittently to recelve its severaldumps, and lever77 being actuated the hopper will be turned back with its load, and atthe same time the mainbell will be opened and the first hopper load willpass into the furnace, 44: arresting automatically'the movement of the110 per at the proper point and closing the mam bell. Lever 23 beingoperated, the contents of the hopper will enter the main hopper,whereupon the rotary hopper being agam filled as before by the actuationof lever 31,, lever 77 is operated, resulting in the reverse movement ofthe hopper a further distance, and the discharge of the contents of themain hopper into the furnace in its changedrelation to the first loadontering the furnace, and so on, each load as it enters the furnace,occupying a diiferent. relation as regards the position of the load as awhole, to the preceding one.

It will be observedthat I am enabled to distribute the skip loads in thehopper in the order desired, notwithstanding the fact that they aredischarged from the skip at a single unchanging point; and I am alsoenabled to vary and control the distribution of the successivehopper'l-oads in the furnace and arrange them with relation to eachother in the order desired and in a uniforu'l and regular manner. I thuscombine in my improved mechanism, the uniformity of distribution of theold hand barrow system, with the time and labor saving advantages of theskip hoist system, and this by automatically operating mechanism underthe perfect control of theattendant.

While I have shown"andjdescribed the actuating pins on the twodisksspaced apart manner, it is obvious that their arrangement may bevaried and changed by makm the pins removable and ditional holes toreceive them, so that by changing the pins in position the hopper may becaused to travel different distances, both whenadva-ncing to receive theloadsffoni the skip, and when reversingv to turn the entire loadbackward.

The arrangement of the circuits by which the hopper motor is controlledby switches 52* and 62, is illustrated in the diagra1ni'natic view, Fig.6, where it will be seen that the current from the generator G passes byconductor 80 to terminal 53 of switch 52", thence from terminal 54 byconductor 81 to commutator brush 82 of motor 32, thence through themotor and out by brush 83 to conductor 8d and again to the generator,which will rotate the motor so as to advance the hopper to receive theskip loads at in: tervals, which motion of the motor will rotate thepilot shaft, as shown by the full line arrow, and turn disk 43 asindicated by the the actuating'pin on disk- 44 will be turned in thedirection of the main hopper with 86 to commutator brush 83 of motor 32,and

thence through the motor in a direction reverse to the other circuit,leaves the same by brush .82, and returns togenerator by conductor 85*.By this current the motor being reversed, the hopper will be turned backand imparting to the pilot shaft :1 reverse motion (which will notaffect disk 43") disk the arrow to bring its actuating pins into actionto operate the switch lever.

It will be observed that from the construction illustrated anddescribed, the rotary hopper is of a capacity sutiicient to hold a.number of skip loads or as is termed portions of the charging .material,and that the hopper is advanced intermittently to predetermined points,so that the skip loads will be deposited in corresponding positions inthe hopper. In these deposited relations the contents of the ho per aredischarged as a single operation. hat is, when the bell is opened thecontents of the hopper fall 11] the ingredients, or skip loads in thesame relations that they occupied in the rotary hopper, and from themain hopper when the main bell is lowered, the contents pass into thefurnace, still occupying, as far as the individual )ortions areconcerned, the same relations. his construction is to be distinguishedfrom those where the charging material passes into the furnace through aspout, in which case While the spout may be advanced to discharge eachindividual skip load at a predetermined point in the furnace, it cannotbe operated to deposit a mass of material into the furnace with thedifferent portions distributed as desired and in the positions theyoccupied after being deposited in the receivin hopper.

Having thus described my invention, what I claim is:

1. In a furnace charging mechanism, the

combination of a receptacle, means for depositing portions of thecharging material at intervals therein, means for shifting the positionof said deposited material as a whole, and means for introducing thesame in their shifted position into the furnace.

2. In a furnace charging mechanism, the

combination with a receiving receptacle, of.

.means fordepositing the charging material at intervals therein, meansfor shifting the position of said deposited material without changingthe individual relations, and means for discharging the same in theirshifted po-' sition into the furnace.

' '3. In a furnace charging mechanism, the

combination with a receiving receptacle, of means for depositingportions of the charging material therein at intervals, means fordischarging said materials in their deposited relations simultaneouslyinto the furnace, means for depositing additional portions of thecharging material at intervals in the receptacle, means for changingtherelation of the same as, a whole with reference to those in thefurnace, and means for discharging the additional charging material intothe furnace in its changed relation.

4. In a furnace charging mechanism, the

combination with a rotary receiving hopper,

of means for moving the same intermittently to receive portions of thecharging material at intervals, means for moving said hopper apredetermined distance after the deposit of the material, in order tochange the position of the hopper load as a whole,'-and means fordepositing the hopper load in the furnace with the portions of thecharge in the relations theyoccupied in the receiving hopper.

5. In a furnace charging mechanism, the combination With a rotaryhopper, of means for'moving the same intermittently to receive portionsof the charge at intervals,

termined positions to receive portions of the charging materials atintervals therein, a main fixed hopper below the rotary hopper adaptedto receive the contents of the rotary hopper, and a closurecontrollingthe communication of the main hopper With the in terior of the furnace.

7. In a furnace charging mechanism, the combination with a rotaryhopper, of actuating mechanism therefor adapted to advance the hopper,means for initiating the action of said mechanism,,mcans forautomatically arresting the motion of the same when the hopper hasadvanced a predetermined distance, mechanism for reversing the movementof the hopper, means for initiating the action of saidreversing-mechanism, and means for automatically arresting the motion ofthe hopper after it has moved a predetermined distance.

8. In a furnace charging mechanism, the combination with a mam hopperand a closure for the same, of operating means for said closure, arotary receiving hopper above the main hopper, a closure for thereceiving hopper controlling the discharge of the contents anism tooperatewhen the action of the hopof the same into the main hopper,-ineans for depositing portions of the charging material at intervals inthe rotary hopper, mechanism for shifting the hopper .'with itsdeposited load, and connections between said mechanism and the mainhopper closure-operating 'means, said connections formed to cause therotary hopper to be shifted when the main hopper closure is opened.. 7

9. In a furnace charging mechanism,..-the combination with a. hoistingdevice for the charging material, of operating mechanism therefor, arotary receiving hopper, independent actuating'mecbanism. for the same,a device for initiating-the action of the said independent actuatingmechanism, and connections between said initiating device and thehoistoperating mechanism, said connections being formed to cause thehoist. mechper mechanism is initiated.

10. In a furnace charging mechanism the combination of va'rotary hopper,actuating mechanism therefor, adapted to advance the hopper, acontrolling device for automatically arresting the motion of the hopperwhen it has advanced a predetermined distance, a hoist device for thechargingmaterials, operating mechanism for the same, and connectionsbetween the controlling device and hoist operating mechanism, acting toautomatically arrest the motion of the hoist mechanism when thecontrolling device operates to stop the hopper.

11. In a furnace charging mechanism the combination of a rotary hopper,means for depositing portions of the charging material at intervalstherein, mechanism for shifting the position of the hopper with itsdeposited load, a controlling device'for said mechan ism, acting toarrest the hopper when it has been shifted a predetermlned distance, amain hopper, a closure for the same, anopera-ting device for-saidclosure, and connections between said operating device and saidcontrolling device, said connections being formed to cause the closuretobe automatically closed when the controlling device acts to arrest thehopper.

12. In a furnace charging mechanism the combination with a rotaryhopper, of actuating mechanism therefor, a controlling device for saidact atiiig mechanism operatively connected and driven by it andformed toautomatically arrest the motion of the hopper at predetermined points inits rotation.

13. In a furnace charging mechanism the combination with a rotary'hopper, of actuating mechanism therefor, a controlling device for said.actuating mechanism formed to automatically arrest the motion of thehopper at predetermined points in its rotation, and means for varymgthepoints at which the hopper will be stopped.

' ward movement,

said member .to its other disk, said pins 40' mechanism.

emcee 14. in a furnace charging mechanism, the combination with a rotaryhopper, of actuating mechanism therefor, a movable control-- deviceoperatively connectedwith the hop per actuating mechanism and providedat intervals with means adapted to engage the movable controlling memberand to shift the same to position to arrest the motion of the hoppermechanism, and means for shifting position to initiate the action of thehopper mechanism.

. 15. In a furnace charging mechanism the combination with a rotaryhopper, of actuating mechanism therefor, a movable controllmg memberadapted when in one position to initiate the action of the hoppermechanism and when in another position to arrest the motion of saidmechanism, a rotary disk operatively connected with the hopper-actuatingmechanism and provided at intervals with actuating pins adapted toengage the movable memb r and shift the same toposition to arrest themotion of the hopper mechanism. 7 p

16. In a furnace charging mechanism the combination with a rotaryhopper, of actuating mechanism therefor, a movable controlling memberadapted when in one position to initiate the action of the hoppermechanism and when in another position to arrest the motion of saidmechanism, a rotary disk driven from the hopper mechanism and providedat intervals with actuating pins adjustable in position on the beingadapted to engage the movable member and shift the same to posit1on toarrest'the "motion of the hopper 17. In a furnace charging mechanism thecomb1nat1onw1th a rotary hopper, of oper ating mechanism thereforreversible in its action to turn the hopper forward or backward, acontrolling device operatively connected with the hopper opera ingmechanisinandadap'ted to control its forward motion, anda secondcontrolling device 'operatively connected with the hopper actuatingmechanism and adaptedto control its backsaid controlling. devices beingindependent of each other in their actions.

18. In a furnace charging mechanismthe combination with a rotary hopper,of an electric motor therefor, operative gearing between the motor andthe hopper, a generator, a switch, a circuit switch, motor and generatorand, leading the current through the motor in one direction, a switchlever, means for actuating the switch lever to close the switch, meanscontrolled by the movement' of the hopper hopper backward,

r ward,

the furnace,

including the switch lever to open the switch when the hopperhas-advanced a predetermined distance, a second switch, a secondcircuit'including the switch, the generator and motor, and leadingthecurrentthrough the latter in a direction reverse to the firstmentioned circuit, a-switch lever for the second switch,

means for actuating said lever to close the switch, and means controlledby the reverse movement of the hopper. mechanism, for

actuating the second switch lever to auto- :m'echanism for automaticallyactuating the mat-ically open the switch when rhc hopper has moxed to apredetermined position.

19. In a furnace charging mechanism the comblnation with a rotaryreceiving hopper,

of mechanism for rotating the same tor ward, means for initiating said'action, means for. automatically arresting the hopper at apredetermined point after each advanced movement, means for turning saidmeansfor initiating said action, and means for automatically arrestingthe hopper when it has turned backward to a predetermined point.v

20. In a furnace charging mechanism the combination with a rotaryreceiving hopper, of mechanism for rotating the same formeans forinitiating said action,

means for automatically arresting the hop per at a predetermined pointafter each advance movement, means for turning said ho er backward meansfor initiatin said actlon, and means for automatically arresting thehopper when it has turned backward to a predetermined point, said ,meansfor arresting the hopper at predetermined point-s being variable at willin their actions.

21. In combination with a furnace, means for conveying portions of thecharging materials at intervals to the topof'the same, a

rotary receiving hopper of a capacity to re 7 ceive and hold a pluralityof said portions of charging materials, a closure for said hopp'er,,.'m'eans for moving the hopper at inter .vals to receive'portionsof the charging materials at difl'erent positions therein, and

means for operating the closure vto simultaneously discharge saidportions of charging materials into the furnace.

22. In combination with a furnace, a rotary receiving receptacle havinga controllable communication with the interior of and adapted to receiveand hold a plurality of skip terials, means for introducing the skiploads successively into the receptacle, means forloads of charging ma-.

giving the receptacle successive partial turns so as to distribute theloads the'reinat successive points, closure to simultaneously dischargesaid loads of charging materials into the furnace.

23; In combination with a furnace, a rotary receiving hopper, avertically movable closure device for the same adapted to conand meansfor operating the;

' fine the charging materials therein tempora- I materials into thereceiving hop rily, means for introducing the charging er from a singleunchanging point, means or turning the hopper to different positions, afixed main hopper beneath the receiving hopper,

- and a closure device controlling the comrotary receiving hopper,

' per below the" receiving hopper,

munication of said main hopper with the in- .terior of the furnace.

24, In combination with a furnace, a

a main fixed hopa closure device controlling the communication of themain hopperwith the interior of the furnace, a closure device for thereceiving hopper adapted when in closed position to confine the chargingmaterials therein, and arranged when opened to permit the contents ofthe receiving hopper to pass therefrom at all points in itscircumference and be evenly distributed in the main hopper, means forintroducing the charging materials into the receiving hopper, and meansfor turning the I normally closing the same.

26. In a furnace chargmg mechanism, the

combination of a plurality of separately -anism, a motive h01stmechanlsm,

hoist mechanism,

movable parts, separate motive-devices for operating said parts, meansfor 'lmtiatmg the action of said motive devices, and means controlled bythe operation of one of said parts for arresting automatically theoperation of both motive devices. a

27 In a furnace charging mechanism, the

combination of a rotary hopper, a motive device for operating the same,a hoist mech- 5 device for operating the means for initiating the actionof said motive devices, and means controlled by the operation of one ofsaid motive devices for automatically arresting the action of both.

28. Ina furnace charging mechanism, the combination of a rotary hopper,an electromotor for operating the same, a hoist mechanism, anelectro-motor for operating the a switch controlling the circuit ofthehopper-motor, a second switch controlling the circuit of thehoist-motor, connections between said switches whereby the closing ofone switch will automatically 0 close the other and initiate the actionof both motors, and} a controlling device operated by the hopper-motorand adapted to automatically open the switches after the hop; per hasturned a predetermined distance.

In testimony whereof I hereunto set my hand this 20th day of May, 1904:,in the presence of two attesting witnesses.

' DAVID BAKER.

Witnesses:

J. L. PoUL'rNnY, LILLIAN M. I-IUDNUT.

